[mythtv-users] Duplicate detection

[Ian Campbell]

On Tue, 2016-09-20 at 10:19 -0400, Michael T. Dean wrote:
> On 09/20/2016 10:13 AM, Ian Campbell wrote:
> > 
> > On Tue, 2016-09-20 at 09:14 -0400, Michael T. Dean wrote:
> > > 
> > > On 09/19/2016 04:24 AM, Jan Ceuleers wrote:
> > > > 
> > > > I thought I had solved this problem by including the following in my
> > > > daily listings cleanup script:
> > > > 
> > > > # Force duplicate matching to rely on title, subtitle, description (or
> > > > whatever
> > > > # is set in the recording rule) by getting rid of program IDs which are not
> > > > # consistent between listings sources.
> > > > update program set programid="";
> > > BTW, if your program IDs are done correctly, this is not required (it's
> > > actually a bad thing).  If the program IDs specify an authority (i.e.
> > > they include a '/', making it an ID in the form "authority/ID"), the ID
> > > is only used for comparison against other programs with the same
> > > authority.  And, every listings source should use a different
> > > authority.  Please check to see if your IDs (when inserted into MythTV's
> > > database) contain an authority.  If not, I think they will if you have a
> > > default authority in dtv_multiplex (for EIT-using channels) and/or
> > > channel (for XMLTV-using channels). Just make sure the authority is
> > > different for each different source of program IDs (and same for each
> > > individual source of program IDs).
> > Does this mean that my programids of the form "SH[0-9]*" and "EP[0-9]*"
> > (which come from xmltv and are most of them) are wrong and should have
> > a prefix of some sort?
> > 
> 
> You don't need a program ID authority if all of your program IDs come 
> from (and "will always come from") the same source (and that source will 
> always use the same IDs for the same shows).  Since Jan has different 
> sources for program IDs, and those different sources use different IDs 
> for a given episode, authorities would be very good for the setup.

Ack, thanks.

The reason I thought of it was because I recent changed which xmltv
grabber I was using, having "$grabber.xmltv.org" as the authority might
have been useful during the transition, but that's hopefully a once a
decade thing (I'd like to say never again, but don't want to tempt
fate!).

Ian.